batman-adv: use shorter pr_warn instead of pr_warning

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c
index 0b84bb1..dc334fa 100644
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -173,9 +173,9 @@
 				 net_dev->dev_addr))
 			continue;
 
-		pr_warning("The newly added mac address (%pM) already exists on: %s\n",
-			   net_dev->dev_addr, hard_iface->net_dev->name);
-		pr_warning("It is strongly recommended to keep mac addresses unique to avoid problems!\n");
+		pr_warn("The newly added mac address (%pM) already exists on: %s\n",
+			net_dev->dev_addr, hard_iface->net_dev->name);
+		pr_warn("It is strongly recommended to keep mac addresses unique to avoid problems!\n");
 	}
 	rcu_read_unlock();
 }